Balloon-tibe patch



May' 1927.

1,629,335 J. F. BRADY ET AL BALLOON TIRE PATCH Filed June 23. 1926 Attorney Patented May 17,1927.

UNITE rrEu orrlce.

JOHN F. BRADY AND RICHARD B. OTT, 0'13, RITZVILLE, WASHINGTON.

BALLOON-TIRE rn'rcn'.

Application filed June 1926. Serial No. 118,055.

This invention relates to what known in V the art as a tire patch and it has more particular reference to one which is (specially adapted to r use in association with low pressure balloon tires devices oi" this kind being frequently referred. to in the trade as repair boots.

More specificallyythe invention has reference to a patch which is constructed for disposition between the inner tube and the tire casing for covering a. split or crack in the casing. 7

Our principalv aim is to provide a. novel patch ot this kind which is highly flexible, durable and substantially evenwearing.

An equally important object, if not more so than the one stated. is the provision of a repair boot of the kind specifiea'l which our bodies suflicient raw material that the friction and the heat generated from the travel of the tire over asurface causes the patch to automatically and accurately conform to the tire and tube and to literally become a part thereof. In fact, to virtually self vulcanize itself to the inner surface of the outer casing.

A further object is to provide a patch. oi this kind which substantially eliminates friction between the inner tube. the boot and the casing, this being accomplished by the use of the different raw substances which are known. friction preventers.

A still further object is to provide a boot of this kind which is even very flexible under comparatively low air pressure, thus preventing the tire from being mis-shapen and disturl'iing the rotary traction effect 0'! the same.

Other objects and advantages of the invention will become apparent from the "fol-- lowing description and d 'awii'igs In the accompanying drawings forming a part of this application. and in which like numerals are employed. to designate like parts throughout the same Figure 1 is a tansversc section tl'n'ough the tire casing and the im 'u'oved patch associated with the same at the break,

Fig. :2 is a top plan view oi the improved patch.

Fig. 3 is a longritlulinal section through the patch.

In the d awing, the reference character 1. designates a conventional tire casing such as is used with the well known low pressure balloon tire, the same being; here shown provided with a break 2 caused by a lilovv out or from some other cause. The inner tube not shown. The patch is generally designated by the reference character 3, and it is shown placed over the break to repair the tire and to obtain considerable more mileage than would otherwise be had.

The patch 3 of laminated construction and it embodies first a relatively small piece of material ClQSiQl'ltLlGd by the reference character 4;. rubber which is used inrepairing treads of tires. but as used in this particular boot constrm-tion. it is semi-cured to'fill the hole or break and to take the road wear just as the tread of the tire would. Itkeeps sand, w:.iter. dirt and road wear from the body oi the boot. and it prevents greater wear (it the break.

This semi-cured piece of material 4 is connected with. a. thinner ply 5 which is of rubher fabric or tire building fabric. It is preferably provided with a: friction'gum on its outer side and is rubberized on the other side. It is made of the usual raw material used in vulcanizing tires, and the -friction gum is very sensitive and will adhere to the inside walls of the tire casing.

It will be noted that the ply 5 is of a greater size than the ply 4 and is also of a greater size than the intermediate tiller 6. It might be conveniently stated here that the two pieces 4 and 5 are not of suflicient strength to prevent the inner tube from going into and thru the break in the tire. or to prevent undue bulging at this point. For this reason the filler 6 is used, and this is of a dry tanned light-weight and very flexible leather. or in the form of 40 ounce duck. stance, the filler is treated with rubber cement in order to connect it to the complemental ply 5 er: fabric. In addition to these three pieces of material. there is still a fourth piece which represented by the reference character 7. and this terms somewhat of a backing; member and is obviously connected both with the filler 6 and the fabric 5.

The outer surface oi this backing member which is of: a greater size than any of the other pieces. is coated with friction gum and the other side is plane fabric or combination gum.

All of the parts being), in overlapping relation and appropriately secured together, and formulated, provides a comparatively In either in- This is of plane tread stock,

flexible patch that readily conforms to the interior Wall of the tire casing and also the exterior adjacent surface of the inner tube. The patch forms an exceptionally practical covering for the rupture and auton'iatically Works itself into the tire and literally becomes a part thereof. In fact, it is substantially selfvulcanizing to the outer casing under the heat generated by the friction due to the runningof the tire. Obviously, this is caused by the raw substances which constitute a part of the patch. The ady antage of the patclu however, is that it is substantial and yet suiiic cently flexible to peLinitit to be used- 'iractically in connection with a low pressure halloontire casing and this is something that has been sought ever since the balloon tire has been in vogue. It has been difficult to get a convenient and practical patch for a rupture in a casing of this kind which would be li 'ht in weight, and which would still be strum not materially disturb the normal shape 0 i the tire casing of the rotary action or to impair traction.

No doubt, by considering the description in connection With the drawingns. persons familiar with devices of this k nd will be able to-jobtai'n a clear tu'lderstanding of the same. Therefore, a more lcng-thly description is thought unnecessary. While the preferred embodiniient of the invention has been illown and described, 1t is to be understood.

and yet that minor changes coming within the field of invention claimed maybe resorted; to if desired.

Having thus described my invention, What We claim as new is 1. A tire patch of the class described em bodying a ntiultiplicity of plies of material, the outer one of which is composed of a scnii-cured rubber gum or plastic rubber to seal the rupture, the adjacent ply compris ing a rubber ial ric connected to the outer- V, the next ply comprising a piece ether to reinforce the rupture.

A tire patch of the class descril'ied emloodyingr a muhiplicity of plies of material,

the outer one of which is composed of a sen'ri-cured rubber gum of plastic rubber to seal the rupture, the adjacent ply comprising a rubber fabric connected to the outermost ply, the next ply comprising a piece of,-

lcather to reinforce the rupture, and the remaining ply constituting abacking member and being" con'iposed-ol': combination fabric having friction gum on its outer side to, hold the patch in place and to cause the entire patch to adhere to the inner surface of the wall of the casing and become literally vulcanized in place.

In testimony whereof \ve our signatures.

JOHN F. BRADY. RICHARD B. OTT, 

